Manufacture of an antifouling paint.



lMwlEiQEE mu m pile worms,

"'racite and borax, 1n

JAN FREDERIK DEN OUDEN, OF HEUVELLAAN, NETHERLANDS, ASSIGNOR TO NAAMLOOZE DER VERF HEUSIET, OF AMSTERDAM, NETHER- LANDS, A CORPORATION ACCORDING TO DUTCH LAW.

VENNOOTSCHAP TOT EXPLOITATIE MANUFACTURE OF AN ANTIFOU LING- PAINT.

This invention relates to a manufacture of;

an antifouling paint for wood, iron and the like, which protects the painted surface fromthe destructive influence of sea water an eliminates or hinders the injurious action of sea weed, mussels and the liken" consists essentially of a mix shell lime, white arsemc, bo-

The new paint ture of coal tar,

After the surface to cleaned, the paint is applied The mixture consists of 70-85 parts, of coal be painted has been thereto.

'- tar, 10-20 parts of pure shell lime, 1 part of I latter being owdered. The

white arsenic, 24 parts of boracite and 2-4 parts of borax. The first three constituents are the preservative proper, the arsenic serving to prevent attachment of sea growth until the paint has acquired the right degree of hardness; the admixture of boracite and borax is for the purpose of hardening the paint, so as to prevent adhesion of mussels and other growth and penetration bypile worms.

In making the paint, the burnt powdered pure shell lime) is inwith white arsenic, cite (the mineral consisting essentially of magnesium borate and magnesium c orid Mg,B,,O, Cl,) and borax (Na,B,O.,), both the coal tar is then gradually a ded, the mixture being continuously stirred to prevent formation of lumps. It is recommended to warm the li uid before use in winter to about 15C.; in t e summer and in the tropics this is not generally necessary.

Instead of pure shell lime, lime from lime- NO C R CLLSSIF suitable proportions.

bora-' Specification of Letters Patent. Application filed August 27, 1907. Serial No. 390,388.

Patented an... as, 1908 stone may be used but a good paint is only obtained when the e is as pure as ossible, that is to say free from impurities le by the burning operation. v

After the surface to be painted,-for example, a ship's bottom or quay piles,-has

been com letelv cleaned the aint is umforfiiIy a lied to the urface, and allowed to coat of coat the work is repea e t e secon painFhavin the same co sition as the p i d first, but without the shell lime.

If ships, boats, pontoons, submerged parts of bridges and the like, are coatedwith the new paint, penetration of pile worms and in jurious growth of sea plants and sea animals are no longer to be feared, since the boracitein combination with the borax under the'ac tion of sea water makes the paint as hard as stone. 1 7 1 Having nowparticularly described and as certained the nature of my said inventio and in what manner the same is to be performed, I declare that what I claim is:

1. An antifouling paint consisting of an '70 intimate mixture containing coal tar, lime, white arsenic,-boracite and borax. P Y

2. An antifouling paint, consistingof an intimate mixture containing about eighty parts of coal tar, about twenty parts of ure 7 I shell lime, one part of white arsenic, a out four parts of boracite and about four parts of j borax, substantially as described. z; if .j,r 3. An antifouling paint consisting of anin timate mixture containing coal tar, white ar-f V, senic, boracite, and borax, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JAN FREDERIK DE ()UDEN'.

Witnesses THOMAS HERMANN VERHAVE,

ANTONIO Ennnn'rs DOOEN. 

